@article{oai:kyutech.repo.nii.ac.jp:00000201, author = {小田部, エドモンド 荘司 and Otabe, Edmund Soji and Hasan, Mohammed N and Matsushita, Teruo and 松下, 照男}, issue = {12}, journal = {Superconductor Science and Technology}, month = {Nov}, note = {We propose a standard method of measurement of the irreversibility field parallel to the c-axis for bulk oxide superconductors at 77.3 K. It is proposed that commercial magnetometers, such as SQUID magnetometers or VSMs (vibrating sample magnetometers), are used for the measurement. Since the irreversibility field depends appreciably on the electric field criterion, the size of the specimen and the time to starting the measurement after setting the external magnetic field are prescribed to fix the electric field criterion. The number of measurement points is proposed as 5–10 within the field range ± 5% around the irreversibility field. It is confirmed that the irreversibility fields of two (Nd, Eu, Gd)-123 (NEG-123) specimens were successfully measured with the proposed standard measurement method. The target COV (coefficient of variation) is 5%.}, pages = {219--222}, title = {A standard method of measurement of the irreversibility field for bulk RE-123 superconductors}, volume = {18}, year = {2005}, yomi = {オタベ, エドモンド ソウジ and マツシタ, テルオ} }